Julie Halard Decugis defeated Ai Sugiyama 7-5 6-1 in the Zurich round of 32 on hard. The upset overturned the form book — Ai Sugiyama came in leading the head-to-head 2–0, defending last year's round of 16, but Julie Halard Decugis had been the form player, winning 4 of their last 6 on hard. Julie Halard Decugis claimed a first win over Ai Sugiyama in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-02-28 | Scottsdale | R16 | hard | Ai Sugiyama | 6-4 6-2 |
| 1999-09-20 | Tokyo | QF | hard | Ai Sugiyama | 6-2 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.